Where can I obtain Blender 2.79c
From Blender's web page:


  Download latest builds from the 2.7 series
  
  
  Blender 2.79b is the last bugfix release in the 2.7 series.
  The last Blender 2.79 nightly build includes additional bug fixes and new
  features on top of 2.79b, which are part of 2.80 too.
  


So, I suppose this is the last nightly build: https://download.blender.org/release/Blender2.79/latest/